Re: [gentoo-user] Re: CFLAGS "...-O3 -pipe" vs "...O2 <no pipe>"

[Daniel Iliev <danny@ilievnet.com>]

Bo Ørsted Andresen wrote:
> On Wednesday 11 April 2007 11:39:50 Daniel Iliev wrote:
>   
>> Exactly what kind of damage are you talking about? Don't you think if
>> there was a real problem with -O3, gentoo devs would have excluded it as
>> an option, especially when they have an easy to apply mechanism for
>> doing that (I have in mind the "filter-flags" && "replace-flags"
>> functions in the ebuilds)?
>>     
>
> -O3 is replaced where necessary because it's supported by Gentoo. Unsupported 
> flags are mostly not filtered as Gentoo devs don't wish to hide problems 
> caused by stupid users. Bugs caused by unsupported flags are therefore mostly 
> resolved invalid.
>
> [SNIP]
>   
>> It is my opinion that the statements like  "-O3 is wrong and can do damage"
>> is nothing but FUD.
>>     
>
> It's true if you don't use Gentoo ebuilds.
>
>   


Sorry, I don't get it. Perhaps it is my poor English but I couldn't
understand two things:
 - Is -O3 supported by Gentoo or not?
 - What's the special thing about Gentoo ebuilds that makes -O3 dangerous?


-- 
Best regards,
Daniel


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